Hi Frank,
I do drum conversions via OMB. It actually allows me to save the conversion tables, so I can use it again & again, plus I can alter them if required. Can save as many as I like. Best part you can also alter the velocity of individual drums by +/-. So if for instance you find your bass drum is playing too loud, put a -10 velocity against the bass drum in your table and it will alter it on just that one drum track or through out the whole style with one simple click.

best wishes
Rikki